I have a Galaxy Note 3 which I purchased on ebay, and has worked fine on t-mobile for over three years. A short while ago it stopped connecting. After spending much time on the phone with support, they decided that the phone had been blacklisted (possibly stolen?), not by t-mobile, but could not say anything else. Then, shortly after that, the phone started working fine again, connecting normally, but lasted only about a week. This does not make any sense to me. I contacted the seller who claims that there was no problem when sold, and they have seen phones blacklisted by mistake. Clearly if this phone was stolen, someone would report it earlier than three years after the fact. This whole situation seems unexplainable, and I would appreciate any thoughts or suggestions.
Best answer by tmo_mike_c
I think it's a bit strange this happened after having the phone for so long, but it's really hard to say exactly what happened. The way it looks is that someone reported it stolen possibly to get a replacement phone through a claim. Again, it seems odd to do something like this after 3 years, but this is just my guess. When buying phones directly through the carrier, it's easier to track where the phones come from as well as any status updates on the IMEI through the systems we use. It gets a bit trickier when phones are purchased through 3rd party channels like ebay as the history of the device can be difficult to track.